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煤层原始瓦斯压力的准确测定一直是现场瓦斯防治工作的技术难题,而传统的各种测定方法均存在一定的局限性。从热力学的角度分析了煤层中微元体的各种状态参数及其变化过程,在此基础上应用力学的相关理论,构建了煤层原始瓦斯压力的数学模型并求出其解析式。现场实测和理论计算的比较分析表明,该计算方法能较准确地反映实测结果。研究结果不仅从理论上进一步完善了煤层瓦斯压力的计算方法,而且对准确确定深部开采煤层和高温矿井的瓦斯压力具有重要意义。
The accurate determination of the original gas pressure in coal seam has always been a technical problem of on-site gas prevention and control. However, the traditional measurement methods all have some limitations. From the viewpoint of thermodynamics, the various state parameters of microelements in the coal seam and its changing process are analyzed. Based on the theory of mechanics, a mathematical model of the original gas pressure in the coal seam is constructed and its analytical formula is obtained. The comparative analysis between field measurement and theoretical calculation shows that the calculation method can reflect the measured results more accurately. The results not only further perfect the calculation method of gas pressure in coal seam theoretically, but also have important significance for accurate determination of gas pressure in deep mining and high temperature coal mines.